The national model Yumi poses with an A4U scale. (Note: "A4U" might refer to a specific size or standard, but it could also be a typo or misunderstanding. If it's meant to represent a certain measurement or concept popular in certain contexts, such as comparing waist sizes to an A4 sheet of paper, this should be clarified.) If "A4U" is intended to mean something else, please provide additional context!